Air-heating appliance



C. D. MOSHER.

Am HEATING APPLIANCE. APPLICATION FILED OCT 6, 1917- 1,364,135. Patented Jan. 4, 1921.

2 SHEETS-SHEET I.

CZarZes .Z7. Weaker.

ATTORNEY C. D. MOSHER. AIR HEATING APPLIANCE.

1 APPLICATION FILED oer-6,1911.

2 SHEETS-SHEET 2.

1364,135, Patented Jan. 4, 1921.

INVENTOR Charles D. 7270.962?

BY a. ATTORNEY To all urhom it may concern UNITED STATES PATENT OFFICE.

CHARLES D. MOSHER, OF NEW YORK, N. Y.

AIR-HEATING APPLIANCE.

Be it known that l. CIIAnLns l). Mosnnn,

a citizen of the l nited States. residing at New York city, in thecounty of New 1 ork and State of New York, have invented certain new and useful Improvements in Air- Heating Appliances, of whiclrthe following is a specification, reference belng had therein to the accompanying drawing.

My invention relates to improvements in means combined with the boiler and furnace of a steam generating plant for heating the air by the products of combustion as the same is supplied to the furnace.

Referring to the accompanying drawings. Figure 1 illustrates in side elevation, partly in section and with parts broken a 'ay. :1

suitable outline of a steam generating plant. illustrating an application of my invention. Fig. 2 is an enlarged perspective view partly in section and parts broken away, illustrating the chamber through which the air supplied for combustion is heated by the waste gases on their way to the flue, and Fig. 3 is an enlarged plan view looking down upon the air heating chamber with theupper part removed.

4 indicates a conventional form of tubular boiler. and 5 the furnace beneath the same from which the gases pass rearwardly over the bridge wall 6, in through the back ,of the boiler 7 and out of the front Sinto the uptake 9.

\Vhen starting the fire the damper 1( is preferably opened or lifted from the flu 12 blown up sufliciently, the damper 10 may be closed or dropped down upon the flue '12, and the grid 17 provided with a counterweight 18 may be openedas shown in dotted outline. TlllSgIldl 17 consists preferably of a's'eriesof steam pipes 19 '(referring-to Fig.

3) providedwith holes such as 20 through which steainmay be blown down through the air heater shown in Fig. 2 for cleaning Specification of Letters Patent.

Patented Jan. 4, 192-1.

' Application filed October 6, 1917. Serial No. 195.033.

the same when the grid is down. The steam pipes 19 are provided with suitable caps such as 21 and at their other ends are connected to theheader 22 receiving steam from the pipe 23 as shown in Fig. 1 a suitable counterweight such as 18 being provided to hold the pipe 19 or grid in opened or closed position. the same serving when closed down. as a damper. This grid is shown open in dotted outline in Fig. 1 and closed in Fig. 3. v

Referring now more particularly to Fig. 2. it will be observed that the air heating chamber therein shown is connected at the top with the fine!) from which the products of combustion having passed through the boiler. pass downwardly between the corrugated plates 25 of the air heater. In other .words. a series of crinkled or corrugated the air heater as shown. alternate spaces'between the tops of said corrugated plates being closed" as indicated at QG'thus allowing the furnaceproducts to pass only through every other space such as indicated by the reference character 27. thus providing for a passage for the hot gases on both sides of each of the air passages. These products of combustion escape through the spaces 27 at the bottom of the air heater and pass through the base fine or duct QS' ft'o the stack 15. In addition to the side walls such as 2t of the air heater. suitable fillers or separators such as 30 may be employed between the corrugated plates for closing the spaces at the sides between them. I

' The alternate fillers illarc also preferably cut away at the top and bottoln'as indicated to allow the air fromthe blower 33 to pass through the openings 31 between the plates of the air heater as aforesaid to the duct 32 by way of the air flue 3-1 whicli=convevsithc heated air beneath the furnace fire. this air having passed in at the bottom of the air heater through the openings 251 from the blower 33. In this way the incoming fresh air is thoroughly heated by the products of combustion passingthroughthc air heater in "the opposite direction.

\Vhat is known as Stratification of gases forms a strong barrier to prevent the trans fer of heat from a gas on one side of a plate to a gas or air. on the other side of the plate. That is, a gas Will flow along a straight surface and closely adhere to that surface thus a naefierahlyirom:thirty:

;the: products ofinomhustion1as the same es;- oape to the uptake 0111 fine, 15,, the corrugated walls 'causi ng .the particles of air. and gases to neboundl-back and-forth from voritlierebl hea jheating only aithin -1's t1 'atu 1:n o f theair or jgas, 'h" 1 st rms a y ee lent insulat th r by p eventing, the heats-from bei transferred toe the adjoining, strata ,or mass of galnawhich passes by w thout q,- r'eggeiving [much --h,eat andathijs 'yafcoountsg for the very poor; efiiclency Ofw'lll; heaters-in general; To

ayoidsucheaotion, j: I .11a provided for the outgoing "hQt. gases; or products. of combustion and: the; incoming cooltt' ',--ana;a mng zmentyprovid' ugh.

as t eaves-1th rta el empratu eL- .1 1. lea "e tthe' i eate {caus .tozforty-fiveidegrees, the an onlone side of the corrugated plate impinging at a point pragtioally opposite,to

v where th hot gases. simpinge, ga ns the t pplate, thu breaking 1-11); stratitioations;and "oausing a: ery} mueh ia'rger; amount. of 1 heat to -.be transferred of;zoomhustion to the ia-ir a oisurfaoe than is possible when the passages'f'are :st-raight,suchas i when madev up F flom-g the foregoingait will he seen that an enfl arged heating SUIT-866 1s presented .to

rug: tiom to; corrugation as they pass theret-l niough caMsin-gedifi'erentparticles to con- "stantlyqcontact with the corrugated surfaces until; the; temperatures becomemore or less uni-forin; i

. =Eor the purposes ofwremoving any pa'rticles iof accumulated dustorsoot upon the icon-ligated walls,. -,the stam tubes "19 may be dropped down in the position. shown in v Fig.5 andthe; steam may beturned on by the, valve 23' -j th usi driving any vaccumulated ,dustkdowm into the dust, pocket ,13, or the grid of tubes. ll'T lnay; he dropped down into position without turning on the valve 23', thereby serving to close off the air heater av -fresh fire is:being;sta1-ted.

the toast. ases;ma na .7 range when the damperllO opened,

Such as when a .The foregoing arrangement pro vides convement, practical ElIlChfiCCGSSlbiQ00115131110- tion, not onl-y I for. pro-heating the: air. supplied to the furnace, but for doing so lefiifrom'rthe sp rit 0 dg s f r saidla andaiternately therewith {providing passages L fonthe; escape \offiurnace gases, said furnace gases passing directlythroughisaldpassag s ,from e t n a s Qrinadmittingathe. air in a.- direction opposite;}t.o--the idire on o'ia as yia d n pm me ib i fl lereu'ith 3111831118 or collecting the deposits '65 cien-tly by utilizing the heat otherwise lost in tl1e :aste gases from the furnace, at1the departing 11* t Q i=p s ng r. gementofl resfrom-said chambers through q wfl rich said tutnaceagases-pass. f 1- y 2. In ;'oon1hinationwvith ,heaterv through which the products of combustionmay be? passed, a -by-pass=,; fo1' said products of combustion,qmeans for passing said products; of: co'm'bustion. through said air heater or through said bypass, -;and means in combinatlon with send an heater for blowing out the dust from said furnace ases.

' -In combination-With a furnace and an air heater for receiving the products of combustion therefrom and for; supplylng air thereto,--a by-passhfor' the products of "oombustlon between sa d arr heatenand said ---furnace,fand means; 1n comb nation with said by --pass for-controlling-the, vproducts of combustion passing therethroug-h.- i

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

CHARLES D. MOSHER. \Vitn'esses: I I ANNA F. DUFFY,

THOMAS A. I'IILL. 1 

